I have a 97 993 cab, the top is less than I year old and I replaced the original because I moved from southern cal to washington state and with the climate change it started to crack. I also discovered that I was getting water on the floorboard of the rear passenger side. I've even gotten a new front windshield and I'm still getting water in the car on the same side. I've checked windows, the top and have no clue. Has anyone ever experienced this or have any ideas what I might check next? Thanks for your responses. MVSenna

 

It might be coming from stopped up drains. One is the fresh air vent in the front near the windshield/hood.

The top should be cotton, & not crack.